Author Question: How many moles of solid NaF would have to be added to 1.0 L of 1.78 M HF solution to achieve a ... (Read 98 times)

magmichele12 · **on:** Mar 21, 2021

Question 1

How many moles of HCl(g) must be added to 1.0 L of 1.9 M NaOH to achieve a pH of 0.00? (Neglect any volume change.)

◦ 0.9 moles
◦ 3.9 moles
◦ 2.9 moles
◦ 4.9 moles
◦ None of these are correct.

Question 2

How many moles of solid NaF would have to be added to 1.0 L of 1.78 M HF solution to achieve a buffer of pH 3.35? Assume there is no volume change. (K_a for HF = 7.2

10^–4)

◦ 2.9
◦ 0.37
◦ 0.91
◦ 1.0
◦ 1.6

kusterl · **Reply #1 on:** Mar 21, 2021

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